Molecular kinetic theory model (AQA A-Level Physics): Quizzes

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Molecular kinetic theory model
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What does Brownian motion provide evidence for?

Existence of atoms and molecules

What causes the random movement of particles in Brownian motion?

Collisions with fluid molecules

According to Boyle's law, how does pressure relate to volume at constant temperature?

Inversely proportional

What happens to gas volume when temperature increases at constant pressure (Charles's law)?

Volume increases

Why does pressure increase with temperature at constant volume (Pressure law)?

Higher collision frequency & speed

Which is a key assumption of kinetic theory?

No intermolecular forces exist

A molecule with velocity uu collides elastically with a wall. What is the change in momentum?

2mu2mu

For random 3D motion, how does mean square speed c2\overline{c^2} relate to u2\overline{u^2}?

c2=3u2\overline{c^2} = 3\overline{u^2}

What does the internal energy of an ideal gas consist of?

Only kinetic energy of particles

The kinetic energy of a gas molecule equals 32kT\frac{3}{2}kT. What does this show?

KE proportional to absolute temp

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